Automatic core chilling device



Mwah l, 132.

2 Sheets-Sheet 1 Filed oct. 22, 1930 o MW d6 5 U Lkllrvull. W. M H Ur Fmm n, l[ b/ .m 97 i o 7 a /3 9u QW 5 Mamh l, 1932. M, GUYOT AUTOMATICCORE CHILLING DEVICE Filed Oct. 22. 1930 2 SheetS-Sheet gnou/toa MAE/U5GUYOT Patented Marll vl, 1932 Memos GUYOT, or cLEvELAND, omo,

AMERICA, OF PITTSBURGH, PENNSYLVANIA, .A

lsaumon ro ALUMINUM comm or CORPORATION OF PENNSYLVANIA AUTOMATIC connemma nEvIcE Application led October 22, 1980. Serial No. 490,882.

My invention relates broadly to a device for chilling metal, and moreparticularly to a method and apparatus for automatically chillingpermanent mold cores and the like t'o a predetermined degree.

In permanent mold or chill casting the metallic structure produced inthe cast article is dependent to a substantial degree upon the ra iditywith which the molten metal 1s chill from the freezing or solidificationpoint and, therefore, upon the initial temperature of the mold and coreparts when the molten metal is poured. It is customary, in operating amold of this type, to assemble the core parts within the mold, lock themold halves together, and pour the metal. As soon as the metal has set,which may be readily and accurately determined by the operator throughobservation of the condition of the gate, the mold halves are loosened`and the core members removed. Since the molten metal is normallymaintained at a constant temperature durin a series of castingoperations, thecore mem ers are heated to substantially the sametemperature during each operation. It has heretofore been customaryorthe operator to dip the heated core members into a pot of coolingwater after each casting operation to restore them to the desiredinitial temperature for another operation. The operator holds the coresin the water until, in his judgment, the temperature has been reduced tothe desired initial temperature for the next casting operation. It isfound that considerable skill is required on the part of the operator tomaintain even an approximate uniformity of' initial core temperatureduring a series of operations.

Accordingly, the principal object of my invention is to eliminate thepersonal equation in the chilling or cooling of the core members duringa series of casting operations, and to mamtain a substantially constantlmtial core temperature.

Another object of the invention is to provide an improved method andapparatus for automatically cooling a heated article a predeterminedamount.

Other objectsl and advantages relating to details of construction andoperation will appear hereinafter.

In the4 accompanying drawings, which illustrate a preferred embodimentof myy invention:

i Fig. 1 is a sectional view of 'a chilling apparatus, showing a coremember in position before immersion into the cooling medium. Thissection is taken on a plane through the line 1'-1 of Fig. 3. v

Fig. 2 is a sectional view taken on a plane through the line 2 2 of Fig.1.

Fig 3 is a plan view of the apparatus.

Fig. 4 is a sectional view taken on a plane through the line 4-4 of Fig.3, showing the means for supportin a side core member.

Referring to the rawings, the apparatus includes a pot or the like 5designed to contain a cooling fiuid, such as water. Posts 6 and 7 aresecured to the pot 5 on opposite sides thereof and extend above the potto support a U-shaped yoke 8. Preferably the yoke 8 is provided withlateral arms 9 apertured to receive and slide upon the supporting posts6 and 7, and provided with set screws 10 to secure the yoke in anydesired position of vertical adjustment.

In the embodiment shown, the bottom of the pot 5 is formed with a boss11 having opposed tapered bores 12 and 13 separated by an annularshoulder 14. A discharge pipe 15 is secured in the bore 13 and may, ifdesired, constitute. a support for the apparatus. An axially allgnedpipe 16 is secured in the bore 12 with its lower end engaging theshoulder 14. The pipe 16 extends upwardly within the pot 5 and is formedat its upper end with an outwardly turned annular flange 17.

A plate 18 integral with the side wall of the pot 5 extends upwardly andoutwardly therefrom to form a supporting rack .fore core members. Asshown, the plate 18 terminates in a supporting edge 20 designed toreceive an outwardly turned flange 21 of a core member 22 to suspend thesame in the pot. A water inlet conduit 23 extends into the pot andpreferably terminates adjacent the bottom thereof. In normal operation acontinuous flow of water enters the pot through the conduit 23. l

Slidably mounted on the pipe 16 is a sleeve 24, counter bored from itsupper end to form a shoulder 25 which normally abuts against the flange17. The sleeve 24 has a plurality of circumferentially aligned openings26 disposed adj acent the upper end 27 thereof. The end 27 is threadedto receive a plug 28 having a plurality of vents or apertures 29therethrough. Disposed between the plug 28 and the flange 17 1s ahelical spring 30 which is normally effective to hold the shoulder 25 incontact with the flange 17. A sleeve 31 fits over the sleeve 24 and hasa plurality of apertures 32 which co-operate with the openings 26 toregulate the rate of flow of fluid from the interior of the pot into thepipe 16. A set screw 33 is arranged to secure the sleeve 28 in anydesired adjusted position relative to the sleeve 24.

In the operation of the device water or other cooling fluid at asubstantially constant temperature enters the pot through the conduit23, passes through the registering openings 32 and 26 into the pipe 16,and is discharged through the pipe 15. The Water level in the pot istherefore determined by the vertical position of the openings 26 and 32,as shown at A in Fig. 4. After a casting has been poured, the operatorremoves the core sections from the mold. In the usual type of permanentmold for casting pistons and the like, for use with which theillustrated embodiment of the core chilling apparatus is particularlyadapted, the core consists of a comparatively large central section,illustrated generally at 34 in Fig. 1, having a supporting ilange 35 anda pair of smaller side sections 22 recessed to form bosses on theinterior of the casting. The central section 34 is placed on the plug28, the upper portion thereof being guided and supported by the U-shapedyoke 8. The side sections are then suspended from the supporting edge 20of the plate 18. The weight of the central section 34 overcomes theforce of the spring 30, causing the sleeve 24 to slide downwardly overthe pipe 16. The supporting flange 35 of the core section 34 engages theyoke 8, and limits the downward movement of the sleeve 24, the height ofthe yoke being adjusted along the rods 6 and 7 to produce the mostdesirable results.

Upon the initial downward movement of the sleeve 24 the end of the coresection 34 is immersed in the water in the pot and chilled. Since theregistering openings 26 is no longer in contact with the water. The

size of the openings and the rate at which the water flows therethroughis adjusted by circumferential movement of the sleeve 31 until theoperation reduces the temperature of the heated core to the desiredinitial ten'iperature for another casting operation.

The side core sections 22 are similarly chilled, since the ends thereofdip into the water at the higher water level and are out of contact withthe Water at the lower level.

After the core members have been chilled, they are removed from theapparatus and again assembled in the mold. When the center core sectionis lifted, the spring 30 restores the sleeve 24 to its uppermostposition and the continuous inflow of water through the conduit 23 againraises the water level to its initial position.

It will be seen that the height of the yoke, the rate of inflow of thewater, and the size of the discharge openings may be readily adjusted tochill the core sections a desired amount, and that the selected initialtemperature is thereafter automatically maintained.

Although the foregoing description is necessarily of a detailedcharacter in order that my invention may be fully disclosed, it is to beunderstood that the invention is not limited to the embodimentillustrated, but is susceptible of modification and re-arrangement ofparts. For example, the apparatus may be readily designedto receive thevarious core sections of any type of mold. In its broader aspects, myinvention may also be utilized for other purposes than chilling cores,lbeing operable to chill or quench any heated article a desiredpre-determined amount.

claim:

'1r-Apparatus for chilling cores comprising a receptacle adapted tocontain a cooling liquid, means for supporting a core in said receptaclein contact with the liquid therein, and means for discharging liquidfrom said receptacle at a pre-determined rate to -bring the levelthereof below said core.

2. Apparatus for chilling cores comprising a receptacle adapted tocontain a cooling liquid, means for introducing liquid into saidreceptacle, means for discharging liquid from said receptacle and fordetermining the level thereof, said last named means being operable bythe insertion of a core into said receptacle to vary the liquid level.

3. A chilling apparatus comprising a receptacle adapted to contain acooling liquid, means for continuously introducing liquid into saidreceptacle, and means for determining the liquid level therein, and amovable support in said receptacle operatively assov`ciatecl with saidlast named means to vary the liquid-level in said receptacle uponmovement of said support.

4. A chilling apparatus comprisingoa. receptacle adapted to contain acooling liquid, a movable support in said receptacle, means for normallyurging said support .towards one extreme of its movement, a liquidoutlet in said receptacle movable to determine the liquid leveltherein,-said outlet being associated with said support to vary theliquid level upon movement of said support.

5. A chilling apparatus comprising a receptacle adapted to contain acooling liquid, means for introducing liquid into said receptacle, amovable support in said receptacle adapted to receive an article to bechilled, and a liquid outlet carried by said su port and arranged todetermine a liquid level)nor mally below an article positioned on saidsupport.

6. A chilling apparatus comprising a receptacle adapted to contain acooling li uid, means for introducing li uid into sai receptacle, avertically movable support in said receptacle adapted to receive anarticle to be chilled and to be moved downwardly by the weight thereof,a liquid outlet carried by said support and arranged to determine thelevel of liquid in said receptacle, said outlet being constructed tolower the liquid level at a pre-determined rate upon downward movementof said support.

7 A chilling apparatus comprising a receptacle adapted to contain acooling liquid, means for continuously introducing liquid into saidreceptacle, a vertically movable support in said receptacle having a suporting surface arranged to receive an artic e to be chilled and to bemoved downwardl by the weight thereof, a liquid outlet con uit connectedto said support, said conduit having an opening positioned below saidsup orting surface serving normally as an over ow for the liquid.

8. A chilling apparatus comprising a receptacle, a discharge pi earranged substantially vertically in saidJ receptacle, a sleeve mountedfor limited sliding movement on said pipe, and a support carried by saidsleeve, said sleeve having an opening below said support.

9. A chilling ap aratus comprising a receptacle, a vertical y adjustableguide member carried by said receptacle, a movable support in saidreceptacle belowsaid ide member, and a discharge conduit carried by saidsupport.

10. A chilling apparatus including a receptacle adapted to contain achilling liquid, a guide member arranged to guide and support an articleto be chilled, and a movable support in said receptacle arranged to bemoved dowi-wardly under the weight of an article to be chilled toimmerse such article in the ing dipping the core into a body of coolingliquid, supporting the core in fixed position, and drawing away theliquid at a pre-determined rate to leave the core supported out ofcontact with the liquid and reduce the temperature of the core a desiredamount.

13. The process of chilling articles through a desired temperature rangecomprising supporting an article in a) body of iuid of a predeterminedtemperature2 ,and draining away the fluid at a pre-determlned rate'toleave thev article out of contact with the fluid.

In testimony whereof I hereunto aiiix my signature this 16 day of Oct.,1930.

MARIUS GUYOT.

